Linking nonstructural carbohydrate dynamics to gas exchange and leaf hydraulic behavior in Pinus edulis and Juniperus monosperma

• DOI: 10.1111/nph.13170
• Publication Date: 2014-11-20T15:45:56Z
• Authors: David R. Woodruff; Frederick C. Meinzer; Danielle E. Marias; Sanna Sevanto; Michael W. Jenkins; Nate G. McDowell
• Keywords: Stomatal Conductance; Growing season

Leaf hydraulics, gas exchange and carbon storage in Pinus edulis Juniperus monosperma, two tree species on opposite ends of the isohydry-anisohydry spectrum, were analyzed to examine relationships between hydraulic function carbohydrate dynamics. vulnerability, leaf water potential (Ψl ), conductance (Kleaf photosynthesis (A), stomatal (gs) nonstructural (NSC) content throughout growing season. vulnerability was significantly lower relatively anisohydric J. monosperma than more isohydric P. edulis. In edulis, Ψl dropped stayed below 50% loss (P₅₀) early day during May, August around midday September, leading sustained reductions Kleaf . P₅₀ only August, resulting maintenance much Mean A gs September monosperma. Foliar total NSC three times greater June, September. Consistently levels suggest that its strategy pushes it towards exhaustion reserves